Press button



vJuly 1o; 192s.

V." PUC PRESS BUTTON Filed Sept. 24, 1926 l/Puc Patented duly l, 1,928.

STATES voJ'roH PUC, or PRAGUE-WEINBERGE, czncnosnovAKrA.y

' f' PRESS BUTTON.

Application med september 24, iaaavsezrial No. 137,568, and 'inczechosio'vakia November 19, 1925.

In press-buttons of a known type, in which springs are provided in theupper orv female part and the cap of the upper` part. has a tubularextension for riveting over,rit`ma` happen that. when being riveted tothe iX- ing washer, the pressure applied'` in riveting may make theslots for` guiding the springs narrower, so that, after the upper partofthe press-button attached to the` fabric has been removed from thepunch used in riveting, the springs can no longer enter the slots. Thisrenders the upper part of the press-button useless, as the opening inthe cap is no longer capable of being constricted yieldingly by thesprings. This results in a great many throw-outs being made.

The object of the present invention is to overcome this difficulty. Theinvention consists substantially in this, that above the slots providedfor receiving the springs the wall of the cap is weakened. Thisweakening which may for instance be effected by reducing the thicknessof the wall of the cap or by cutting away portions of thewall, has theeffect that'the pressure exertedv in riveting cannot be propagated asfar as the slots of the springs and is limited to the compression of theweakened part of the cap.

The slots for the springs thus always re tain their dimension requiredfor giving the springs the necessary play.

In the accompanying drawing two con structional examples of the upperpart of the press-button are shown,

The left hand part of Figure l being a longitudinal section through oneconstruc- Jcional `form of the upper part of the pressbutton beforebeing riveted to the fixing washer and the right hand part` of thefigure being a longitudinal section of the upper part of thepress-button after it has been fixed to the'material.

Fig. 2 is a longitudinal section throughy a plane at right angles tothat of the section in Fig. l, and

Fig. 3 a second constructional form of the upper part of thepress-button in longitudinal section.

The-upper part of the press-button shown in Figs. l and 2 consists in aknown manner oi. the cap l whichris provided with the iiange 9 and towhich is connected the hollow rivet 2 the diameter of which is reducedso as tojorm the projecting annular shoulder 8. The cap is provided withthe slots 3 for the reception ol? the springs 4. When rivet--A l2 isobtained (F ig. 3).

ing the upper part of the press-button for the washer 5 with thematerial 6 between the said washer and the flange 9, it has hithertobeen necessary to keep the cap l supported by y its annular shoulder 8resting on the lower die 7 of the riveting press and for ,the Range 9 ofthe upperpart of the press-button to be at a certain distance from thepart 10 of greater diameter of the lower die.. Only' in this way was itpossible to prevent the zslotsj of the cap from being compressed throughthe ypressure used in riveting so that 'i the springs 4, after removingthe upper part of the press-button from the riveting die 7` could engagefreely in the slots 3.

As it may occur that for instance the axial .dimension of the rivetingdie 7 may change owing to wear and that the cap will consequently nolonger be supported by the die 7 against the pressure exerted inriveting, so that the flange 9 rests immediately on the part 10 of thedie, accordingto the present invention slots l1 are provided in the cappart above the slots 3.

The riveting pressure, on being applied, will act on the upper part ofthe cap l, which has been weakened by the slots l1, so that the materialof the cap will only becompressed in this part, until the annularshoulder 8 rests on the die 7 The slots 3 will on the other hand haveremained unaltered, thus ensuring that the springs 4 will engageproperly with the slots after the rivetinghas been completed. y

As will be Vreadily seen, the invention makes it possible for the cappart to merge directly in the hollow rivet, thus doing away with theannular shoulder 8 so that a straight, cylindrical or conical wall 12,12', By weakening the material above the slots 3`for the springs it lisonly necessary for the lower die 7 to enter into the cap as far as isnecessary for securing its central position on the upper die of theriveting press. A further advantage is that the upper part of the pressbutton is easier to make without the annular shoulder 8. y

What I claimis: Y y

l. For use inv a press button fastener, a socket part having a tubularextension capable of being riveted over for securing the socket part inposition, slots in the said socket partfand springs in the socket partextending through the said slotsfor ing with a stud part, weak places inthe wall of the socket part above the said slots for socket part inposition,

the springs,

3. For use in e press button fastener, a.

socket part having a tubular extension capable of being riveted over forsecuring the ysocket part in position, slots in the socket part andsprings in the socket part eX- tending through the said slots forengaging -with a stud part, said tubular extension being constructed toform a smooth continua- -socket part in position,k

tion of thel Wall of the socket part and Weak places being provided inthe said Wall of the socket part above the said slots for the springs,as and for thepurpose set forth.

4i. For use in a press button fastener, a

rsocket part having a tubular extension capable of being riveted overfor securing the slots in the said socket part and springs in the socketpart extending through the said slots for engaging with a stud part,said tubular extension being tapered and forming ar smooth continuationof the Wall of the socket l(ind Weak places being provided in' the Wallofthe socket part above the said slots for the springs, as and for thepurpose set forth.

In testimony Whereofl have signed my name .to this' specification.

vvoJToH rUo.

